<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>demo8 how vue collect depth</title>
  <script src="./vue.js"></script>
</head>

<body>
  <div id="app">
    <h2>how vue collect depth</h2>
    <p class="cont">
      {{ content }}
    </p>
  </div>

  <script>
    let vm = new Vue({
      el: "#app",
      data() {
        return {
          content: ""
        }
      }
    })
  </script>
</body>

</html>